@@mlmoore11 Sorry, I meant why did he cut slits in the seam allowance of that panel where the straps get stitched in and then bar stitch it. There was no reason to do that, as the panel lays flat and there is no relief needed there
@@Allanrpsx Re: where the shoulder strap attaches to the back panel. The slits are there to make it easier to sew, as the seam is not linear - it's angled in two places and very hard to sew stiff fabric where the angle changes without the slits. If it were a strait line, then the slits be unhelpful. The bar tacks would be there regardless, because the back panel may be flat laying on a table, but it is not flat while carrying the pack loaded with weight. There is a large amount of stress where the shoulder straps meet the back panel, and the back panel fabric is strongly puckered outward along that seam, even when carrying moderate loads.
@mlmoore11 the bar tacks that were placed at the end of the slit only serve to reinforce the weak point created by the slit. If the seam allowance is kept in tact the bar tack is entirely unnecessary, as the seam allowance itself reinforces that point. This seam is not difficult to sew without the slits, it is a simple matter of realigning the pieces when the corner is reached. In my opinion, cutting slits just creates more work and creates a weak point in the finished product.
@@Allanrpsx I've tried sewing the straps both ways - with and without slits, and I find it easier with the slits, given my limited sewing abilities. Your results may differ. Is the seam weaker with the slits - theoretically yes. But I've not seen this seam fail yet on any of my packs. Often times real-world ease of sewing outweighs theoretical benefits.
Found my way here via a 7 year old reddit post that lead my to your site. Appreciate the knowledge and thorough explanation.
thanks for your tutorial ! helpful
why cut the panel that holds the load lifters? That panel sits flat when the seam is finished
It's easier to attach the load lifter webbing to the pack at a seam than to sew the webbing onto the middle of a panel of fabric IMHO, but YMMV.
@@mlmoore11 Sorry, I meant why did he cut slits in the seam allowance of that panel where the straps get stitched in and then bar stitch it. There was no reason to do that, as the panel lays flat and there is no relief needed there
@@Allanrpsx Re: where the shoulder strap attaches to the back panel. The slits are there to make it easier to sew, as the seam is not linear - it's angled in two places and very hard to sew stiff fabric where the angle changes without the slits. If it were a strait line, then the slits be unhelpful. The bar tacks would be there regardless, because the back panel may be flat laying on a table, but it is not flat while carrying the pack loaded with weight. There is a large amount of stress where the shoulder straps meet the back panel, and the back panel fabric is strongly puckered outward along that seam, even when carrying moderate loads.
@mlmoore11 the bar tacks that were placed at the end of the slit only serve to reinforce the weak point created by the slit. If the seam allowance is kept in tact the bar tack is entirely unnecessary, as the seam allowance itself reinforces that point. This seam is not difficult to sew without the slits, it is a simple matter of realigning the pieces when the corner is reached. In my opinion, cutting slits just creates more work and creates a weak point in the finished product.
@@Allanrpsx I've tried sewing the straps both ways - with and without slits, and I find it easier with the slits, given my limited sewing abilities. Your results may differ. Is the seam weaker with the slits - theoretically yes. But I've not seen this seam fail yet on any of my packs. Often times real-world ease of sewing outweighs theoretical benefits.